import router from "./router";
import store from "./store";
import { Message } from "element-ui";
import NProgress from "nprogress"; // progress bar
import "nprogress/nprogress.css"; // progress bar style
import { getToken } from "@/utils/auth"; // get token from cookie
import getPageTitle from "@/utils/get-page-title";

NProgress.configure({ showSpinner: false }); // NProgress Configuration

const whiteList = ["/login"]; // no redirect whitelist
// 用户登录成功后，最先到-全局前置钩子函数--拦截路由进行处理
router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start();
  // set page title
  document.title = getPageTitle(to.meta.title);
  // determine whether the user has logged in
  const hasToken = getToken();
  // 然后在判断 是否存在token的逻辑
  if (hasToken) {
    const hasGetUserInfo = store.getters.userInfo; //判断是否拉去用户信息--如果没有去请求接口
    if (hasGetUserInfo) {
      if (to.path === "/login") {
        // if is logged in, redirect to the home page
        next({ path: "/" });
        NProgress.done();
      } else {
        next();
      }
    } else {
      try {
        // get user info
        next();
      } catch (error) {
        // remove token and go to login page to re-login
        await store.dispatch("user/resetToken");
        Message.error(error || "Has Error");
        next(`/login?redirect=${to.path}`);
        NProgress.done();
      }
    }
  } else {
    /* has no token */

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next();
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`);
      NProgress.done();
    }
  }
});
// 全局后置守卫 页面加载之后
router.afterEach(() => {
  // finish progress bar
  NProgress.done();
});
